Name: 4Pcs Air Fuel Ratio & O2 Sensor Set for Toyota Sienna 3.5L V6 (2011-2016) | 234-9114 234-9128 234-4416 234-4540
SKU: 234-9114 234-9128 234-4416 234-4540
Price: 123.95 USD
Availability: InStock

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4Pcs Air Fuel Ratio & O2 Sensor Set for Toyota Sienna 3.5L V6 (2011-2016) | 234-9114 234-9128 234-4416 234-4540

$123.95 $127.22

-3%

In stock

🔥 Automatically enjoy an 8% discount

Signs You Need to Replace This O2 Sensor:

Your Check Engine Light (CEL) is on.
Experiencing poor fuel economy (gas mileage).
Rough idling or engine hesitation.
Common Trouble Codes: P0133, P0134, P0135, P0420.

📖 Not sure how to fix these codes? Read our Ultimate O2 Sensor Diagnostic Guide ➔

🛡️ Four Major Safeguards +

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Free & Fast ShippingShips within 72 hrs from US

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30-Day ReturnsReturn to our FL, USA center

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2-Year Warranty100% Brand New & Tested

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Automotive-Leader Sensors

Vehicle Compatible

Year	Make	Model	Engine/Displacement
2012	Toyota	Sienna	3.5L V6
2013	Toyota	Sienna	3.5L V6
2014	Toyota	Sienna	3.5L V6
2015	Toyota	Sienna	3.5L V6

Product Specifications

Warranty & Support: 2 Years + 24/7 Technical Support

Item	Specification
Core Part Number	234-9114 (Upstream Left) Interchange: 2349114, 234 9114, 89467-0E140, 89467-0R050, 89467-0R060, 89467-21020, 89467-48210, 894670E140, 894670R050, 894670R060, 8946721020, 8946748210
	234-9128 (Upstream Right) Interchange: 2349128, 234 9128, 89467-06140, 89467-06160, 89467-0E170, 89467-33220, 89467-33230, 89467-48190, 8946706140, 8946706160, 894670E170, 8946733220, 8946733230, 8946748190
	234-4416 (Downstream Left) Interchange: 2344416, 89465-0E040, 89465-48220, 894650E040, 8946548220
	234-4540 (Downstream Right) Interchange: 2344540, 89465-08060, 8946508060
Position	Exhaust System (Upstream Left/Right & Downstream Left/Right)
Key Parameters	Upstream Left (234-9114): - Type: Heated Oxygen Sensor - Wire Configuration: 4-Wire - Wire Harness Length: 330 mm / 12.40 IN - Grade: Regular - Fitment: Specific Application Upstream Right (234-9128): - Type: Heated Oxygen Sensor - Wire Configuration: 4-Wire - Wire Harness Length: 16.34 IN (Approx. 415mm) - Grade: Regular - Fitment: Specific Application Downstream Left (234-4416): - Type: Heated Oxygen Sensor - Wire Configuration: 4-Wire - Connector Gender: Male - Mounting Type: Threaded - Thread Diameter: 0.708 IN (~M18) - Wire Harness Length: 10.04 IN (Approx. 255mm) Downstream Right (234-4540): - Type: Heated Oxygen Sensor - Wire Configuration: 4-Wire - Connector Gender: Female - Mounting Type: Threaded - Thread Diameter: 0.708 IN (~M18) - Wire Harness Length: 16.93 IN (Approx. 430mm)

Package Included: 4Pcs O2 Sensors

234-9114*1(4-wire oxygen Sensor): Upstream Left, Bank 2 Sensor 1

234-9128*1 (4-wire oxygen Sensor): Upstream Right, Bank 1 Sensor 1

234-4416*1 (4-wire oxygen Sensor): Downstream Left, Bank 2 Sensor 2

234-4540*1 (4-wire oxygen Sensor): Downstream Right, Bank 1 Sensor 2

1. When your vehicle malfunctions, use a CBD to scan and identify the fault codes (if you're unsure how to scan or interpret the codes, visit our blog for guidance).

2. Identify the faulty component based on the diagnostic code and remove it.

3. Select your vehicle's year, model, and brand directly from the search panel below, or search by the part number on the component to verify compatibility.

4. After selecting, click “Search.” A green result confirms the part is compatible. If unsure, click the result below to view deta

Bank 1 Sensor 1 means Upstream Right/Rear; Bank 2 Sensor 1 means Upstream Left/Front

Bank 1 Sensor 2 means Downstream Right/Rear; Bank 2 Sensor 2 means Downstream Left/Front

sensor 1=Upstream sensor 2=Downstream

Fast Response & Speed & Stable Performance & Longer Service Life

High-quality materials used, enhance durability performance

100% Rigorous Tested Before On Sale & Shipment

Meet The Professional Specification As OEM Standard

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FAQ & Support

🚦 1. Trouble Codes & Symptoms

Q1: My car shows codes like P0420 / P0171 / P0138. What do they mean?

These are common codes related to the fuel system or oxygen sensors:

P0420: Catalyst efficiency below threshold
P0171: System too lean
P0138: O2 sensor voltage high

They often indicate a worn oxygen sensor, exhaust leak, or ignition issue. If you're not sure, simply tell us your year, make, model, and engine—we'll check the exact part you need.

Q2: My engine shakes at idle. Is my ignition coil bad?

It's very possible. Common symptoms of a failing ignition coil include:

Rough idle or shaking
Hard cold starts
Poor acceleration
Higher fuel consumption
Misfire popping noise

Tell us your vehicle info—our team can help you identify the cause.

Q3: What are the symptoms of a bad oxygen sensor?

Typical signs include: Check Engine Light on, Increased fuel consumption, Poor acceleration, Strong fuel smell, and Slow throttle response.

Most sensors should be replaced every 80,000–100,000 km.

🔍 2. Fitment & Compatibility

Q4: How do I know which oxygen sensor fits my car?

Just provide: Year, Make, Model, and Engine size.

We'll confirm: Upstream or downstream, Correct connector, Proper OEM reference number, and Federal vs. California emissions compatibility.

Q5: What's the difference between OEM and aftermarket ignition coils?

OEM: Same quality as the factory part; long-lasting.
High-quality aftermarket: Close to OEM but more affordable.

We only offer high-grade, reliable ignition coils.

Q6: How many oxygen sensors does my car have?

Most vehicles have 2–4 sensors (Upstream front and Downstream rear). We can confirm the exact number for your vehicle.

🛒 3. Buying, Quality & Concerns

Q7: Are cheap oxygen sensors reliable?

They work for a short time but usually cause issues like short lifespan, slow response, and frequent check engine lights.

We only sell new, high-quality, fully tested sensors.

Q8: How can I avoid buying a refurbished or used auto part?

Check for scratches on the connector, dirty wiring, or marks on threads.

Our parts are 100% brand new, never refurbished, and fully tested.

🧰 4. Installation & Usage

Q9: Can I install an oxygen sensor myself?

Yes. Difficulty: medium.

You'll need an O2 sensor socket, Anti-seize compound, and a Torque wrench. We recommend clearing fault codes with an OBD scanner after installation.

Q10: Do ignition coils need programming after replacement?

In most vehicles, no programming is required. Just swap the old coil with the new one.

💰 5. Value & Performance

Q11: Your parts cost less than OEM. Are they really reliable?

Yes—our parts use the same-grade materials and testing standards as OEM suppliers. Because we don't go through dealer channels, the price is much more affordable.

About us

Automotive Leader started with a simple mission: to provide mechanics and DIYers with OEM-grade parts at affordable prices.

China Address

Room 602, No. 152 Helong East Road, Helong Subdistrict, Baiyun District, Guangzhou City Postal Code: 510000

U.S. Address:
7600 LTC Parkway 34986
PORT SAINT LUCIE, FL - United States

Phone Number: +86 15812449181

Email: support@automotive-leaderstore.com

Logistics Policy

1. U.S. Warehouse (Standard Option)
Handling time: 1-3 business days
Transit time (days): 3-7 business days via USPS/UPS/FedEx.

2. China Warehouse (Standard Option)
Handling time: 1-3 business days
Transit time (days): 14-22 business days via USPS/UPS/FedEx.

Refund and Return Policy

30-Day Return Policy / Return shipping is free.

We do not accept direct exchanges.

After receiving and inspecting your returned item, we will notify you whether your refund has been approved.

If approved, the refund will be processed back to your original payment method within 5 business days.

Please note that your bank or credit card company may also require additional time to process and reflect the refund.

If you have not received your refund within 10 business days after your return request has been approved, please contact us.

Contact: support@automotive-leaderstore.com

Account

4Pcs Air Fuel Ratio & O2 Sensor Set for Toyota Sienna 3.5L V6 (2011-2016) | 234-9114 234-9128 234-4416 234-4540

Signs You Need to Replace This O2 Sensor:

Automotive-Leader Sensors

Vehicle Compatible

Product Specifications

Customer Reviews

Subscribe to our email list to receive a 10% VIP discount.

FAQ & Support

🚦 1. Trouble Codes & Symptoms

🔍 2. Fitment & Compatibility

🛒 3. Buying, Quality & Concerns

🧰 4. Installation & Usage

💰 5. Value & Performance

About us

Logistics Policy

Refund and Return Policy

Country/Region

Country/Region

4Pcs Air Fuel Ratio & O2 Sensor Set for Toyota Sienna 3.5L V6 (2011-2016) | 234-9114 234-9128 234-4416 234-4540

Signs You Need to Replace This O2 Sensor:

Automotive-Leader Sensors

Vehicle Compatible

Product Specifications

Customer Reviews

Subscribe to our email list to receive a 10% VIP discount.

FAQ & Support

🚦 1. Trouble Codes & Symptoms

🔍 2. Fitment & Compatibility

🛒 3. Buying, Quality & Concerns

🧰 4. Installation & Usage

💰 5. Value & Performance

About us

Logistics Policy

Refund and Return Policy